UITableView has extra space on top during "pull down to refresh"

Question

I have a problem with my tableview. It has a space on top like this:

When I open the TasksTableViewController, the problem doesn't show. But when I open another viewcontroller from TaskTableVC like this:

 FilterTasksTableViewController * fttvc = [self.storyboard instantiateViewControllerWithIdentifier:@"FilterTasksTableViewController"];
fttvc.delegate = self;
UINavigationController * navVC = [self.storyboard instantiateViewControllerWithIdentifier:@"PopoverNavigationController"];
[navVC setViewControllers:@[fttvc]];
[self presentViewController:navVC animated:YES completion:nil];

and go back to TaskTableVC, the problem occurs. When I "pull down to refesh", it goes back to normal.

in my code for TaskTableVC:

- (void)viewWillAppear:(BOOL)animated {
//other code
[self populate];
}

- (void)viewDidLoad {

 dispatch_async(dispatch_get_main_queue(), ^{

   self.refreshControl = [[UIRefreshControl alloc] init];

    self.refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@" "];

    [self.refreshControl addTarget:self action:@selector(refresh) forControlEvents:UIControlEventValueChanged];

    [self setRefreshControl:self.refreshControl];

});

    [self populate];
}

- (void)populate {

TaskHandler *handler = [[TaskHandler alloc] initWithContext:_context];
NSArray *allTasks = [handler getAll];

_tasks = [self filterTasks:allTasks];

NSSortDescriptor *descriptor = [[NSSortDescriptor alloc] initWithKey:@"startDate" ascending:NO];
NSArray *descriptors = [NSArray arrayWithObjects:descriptor, nil];
_tasks = [[NSMutableArray alloc] initWithArray:[_tasks sortedArrayUsingDescriptors:descriptors]];
dispatch_async(dispatch_get_main_queue(), ^{
    [self.tableView reloadData];
    [self.refreshControl endRefreshing];
});

}

I hope you can help me with this weird problem.

Answer 1

I solved my problem with the code. I thought there was something wrong with the Refresh control so I moved it out of the dispatch_aysnc(dispatch_get_main_queue() and added [self.tableview reloadData . That fixed my problem. Thanks everyone for answering. :)